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Title
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Improving method reliability in carotenoid analysis through selective removal of glycerolipid interferences by lipase treatment
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Author
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Abstract
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| Saponification is most often used to hydrolyze glycerolipid interferences during carotenoid analysis. Ester bonds of other plant metabolites such as carotenoids are, however, also hydrolyzed during saponification, thus altering the natural carotenoid composition. A straightforward and selective cleanup procedure was therefore developed involving the enzymatic hydrolysis of matrix glycerolipids. The optimized procedure (100 mu L of extracted vegetable or algal oil in 20 mL of 50:50 phosphate buffer/methanol with 25 mu L of sodium n-octyl sulfate, 30 mg of bile salts, and 250 mu L of NaCl solution (5 mM), magnetic stirring for 2 h at 40 degrees C with 1 mL of Lipozyme TL 100 L and 1 mL of Lipozyme CALB L) removed the greater part of triglycerides (94.8-100.0%) and diglycerides (88.2-99.8%) while preserving the natural carotenoid composition. |
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Language
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English
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Source (journal)
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Journal of agricultural and food chemistry. - Washington, D.C.
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Publication
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Washington, D.C.
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2014
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ISSN
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0021-8561
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DOI
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10.1021/JF405477S
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Volume/pages
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62
:14
(2014)
, p. 3114-3124
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ISI
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000334572500012
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Full text (Publisher's DOI)
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